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Restructuring and Related Charges - Pretax Restructuring Charges (Credits) (Details) - USD ($)
$ in Thousands
3 Months Ended
Jul. 31, 2023
Jul. 31, 2022
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges $ 12,123 $ 22,441
Global Restructuring Program    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 11,780 21,741
Restructuring and related charges, total 60,662  
Global Restructuring Program | Corporate, Non-Segment    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 6,992 14,916
Restructuring and related charges, total 39,871  
Global Restructuring Program | Severance and termination benefits    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 5,944 12,097
Restructuring and related charges, total 31,771  
Global Restructuring Program | Impairment of operating lease ROU assets and property and equipment    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 1,575 6,106
Restructuring and related charges, total 14,271  
Global Restructuring Program | Acceleration of expense related to operating lease ROU assets and property and equipment    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 364 1,840
Restructuring and related charges, total 2,504  
Global Restructuring Program | Facility related charges, net    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 829 1,698
Restructuring and related charges, total 4,979  
Global Restructuring Program | Consulting costs    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 1,823 0
Restructuring and related charges, total 4,108  
Global Restructuring Program | Other activities    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 1,245 0
Restructuring and related charges, total 3,029  
Global Restructuring Program | Research | Operating Segments    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 1,947 81
Restructuring and related charges, total 4,360  
Global Restructuring Program | Learning | Operating Segments    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 218 3,131
Restructuring and related charges, total 8,022  
Global Restructuring Program | Held for Sale or Sold | Operating Segments    
Restructuring Cost and Reserve [Line Items]    
Restructuring and related charges 2,623 $ 3,613
Restructuring and related charges, total $ 8,409